New book History and geography If the Battle of Sekigahara had been a long battle, Date Masamune would have unified the whole country. Takarajimasha Shinsho

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History / Geography
Takarajimasha Shinsho / Date Masamune who might have won the country in place of Ieyasu. This book examines three 「 if 」 : (1) if Date Masamune was born 10 years early, (2) if the Battle of Sekigahara was prolonged and Masamune had a chance, (3) if Masamune had a serious alliance with Spain. It also examines the conditions under which the Battle of Sekigahara would be prolonged, such as if Ishida Mitsunari calmly returned to Sawayama and joined Terumoto MORI in 「, or if Terumoto MORI did not surrender Osaka-jo Castle to Ieyasu. And if the Battle of Sekigahara was prolonged and the time went back to the Sengoku period (period of warring states) and 」, what chance did Date Masamune in the Tohoku region have? The relationship between Ieyasu's sixth son, Tadateru, and Okubo Nagayasu is interwoven to describe how Date Masamune, backed by his alliance with Spain, evaded Ieyasu's oppression, took control of the country, and expanded overseas without isolation.